| 1 | /* BFD back-end for Intel i860 COFF files. |
| 2 | Copyright (C) 1990-2015 Free Software Foundation, Inc. |
| 3 | Created mostly by substituting "860" for "386" in coff-i386.c |
| 4 | Harry Dolan <dolan@ssd.intel.com>, October 1995 |
| 5 | |
| 6 | This file is part of BFD, the Binary File Descriptor library. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 21 | MA 02110-1301, USA. */ |
| 22 | |
| 23 | #include "sysdep.h" |
| 24 | #include "bfd.h" |
| 25 | #include "libbfd.h" |
| 26 | |
| 27 | #include "coff/i860.h" |
| 28 | |
| 29 | #include "coff/internal.h" |
| 30 | |
| 31 | #ifndef bfd_pe_print_pdata |
| 32 | #define bfd_pe_print_pdata NULL |
| 33 | #endif |
| 34 | |
| 35 | #include "libcoff.h" |
| 36 | |
| 37 | |
| 38 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2) |
| 39 | /* The page size is a guess based on ELF. */ |
| 40 | |
| 41 | #define COFF_PAGE_SIZE 0x1000 |
| 42 | |
| 43 | /* For some reason when using i860 COFF the value stored in the .text |
| 44 | section for a reference to a common symbol is the value itself plus |
| 45 | any desired offset. Ian Taylor, Cygnus Support. */ |
| 46 | |
| 47 | /* If we are producing relocatable output, we need to do some |
| 48 | adjustments to the object file that are not done by the |
| 49 | bfd_perform_relocation function. This function is called by every |
| 50 | reloc type to make any required adjustments. */ |
| 51 | |
| 52 | static bfd_reloc_status_type |
| 53 | coff_i860_reloc (bfd *abfd, |
| 54 | arelent *reloc_entry, |
| 55 | asymbol *symbol, |
| 56 | void *data, |
| 57 | asection *input_section ATTRIBUTE_UNUSED, |
| 58 | bfd *output_bfd, |
| 59 | char **error_message ATTRIBUTE_UNUSED) |
| 60 | { |
| 61 | symvalue diff; |
| 62 | |
| 63 | if (output_bfd == (bfd *) NULL) |
| 64 | return bfd_reloc_continue; |
| 65 | |
| 66 | if (bfd_is_com_section (symbol->section)) |
| 67 | { |
| 68 | /* We are relocating a common symbol. The current value in the |
| 69 | object file is ORIG + OFFSET, where ORIG is the value of the |
| 70 | common symbol as seen by the object file when it was compiled |
| 71 | (this may be zero if the symbol was undefined) and OFFSET is |
| 72 | the offset into the common symbol (normally zero, but may be |
| 73 | non-zero when referring to a field in a common structure). |
| 74 | ORIG is the negative of reloc_entry->addend, which is set by |
| 75 | the CALC_ADDEND macro below. We want to replace the value in |
| 76 | the object file with NEW + OFFSET, where NEW is the value of |
| 77 | the common symbol which we are going to put in the final |
| 78 | object file. NEW is symbol->value. */ |
| 79 | diff = symbol->value + reloc_entry->addend; |
| 80 | } |
| 81 | else |
| 82 | { |
| 83 | /* For some reason bfd_perform_relocation always effectively |
| 84 | ignores the addend for a COFF target when producing |
| 85 | relocatable output. This seems to be always wrong for 860 |
| 86 | COFF, so we handle the addend here instead. */ |
| 87 | diff = reloc_entry->addend; |
| 88 | } |
| 89 | |
| 90 | #define DOIT(x) \ |
| 91 | x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask)) |
| 92 | |
| 93 | if (diff != 0) |
| 94 | { |
| 95 | reloc_howto_type *howto = reloc_entry->howto; |
| 96 | unsigned char *addr = (unsigned char *) data + reloc_entry->address; |
| 97 | |
| 98 | switch (howto->size) |
| 99 | { |
| 100 | case 0: |
| 101 | { |
| 102 | char x = bfd_get_8 (abfd, addr); |
| 103 | DOIT (x); |
| 104 | bfd_put_8 (abfd, x, addr); |
| 105 | } |
| 106 | break; |
| 107 | |
| 108 | case 1: |
| 109 | { |
| 110 | short x = bfd_get_16 (abfd, addr); |
| 111 | DOIT (x); |
| 112 | bfd_put_16 (abfd, (bfd_vma) x, addr); |
| 113 | } |
| 114 | break; |
| 115 | |
| 116 | case 2: |
| 117 | { |
| 118 | long x = bfd_get_32 (abfd, addr); |
| 119 | DOIT (x); |
| 120 | bfd_put_32 (abfd, (bfd_vma) x, addr); |
| 121 | } |
| 122 | break; |
| 123 | |
| 124 | default: |
| 125 | abort (); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | /* Now let bfd_perform_relocation finish everything up. */ |
| 130 | return bfd_reloc_continue; |
| 131 | } |
| 132 | |
| 133 | /* This is just a temporary measure until we teach bfd to generate |
| 134 | these relocations. */ |
| 135 | |
| 136 | static bfd_reloc_status_type |
| 137 | coff_i860_reloc_nyi (bfd *abfd ATTRIBUTE_UNUSED, |
| 138 | arelent *reloc_entry, |
| 139 | asymbol *symbol ATTRIBUTE_UNUSED, |
| 140 | void *data ATTRIBUTE_UNUSED, |
| 141 | asection *input_section ATTRIBUTE_UNUSED, |
| 142 | bfd *output_bfd ATTRIBUTE_UNUSED, |
| 143 | char **error_message ATTRIBUTE_UNUSED) |
| 144 | { |
| 145 | reloc_howto_type *howto = reloc_entry->howto; |
| 146 | (*_bfd_error_handler) (_("relocation `%s' not yet implemented"), howto->name); |
| 147 | return bfd_reloc_notsupported; |
| 148 | } |
| 149 | |
| 150 | #ifndef PCRELOFFSET |
| 151 | #define PCRELOFFSET FALSE |
| 152 | #endif |
| 153 | |
| 154 | static reloc_howto_type howto_table[] = |
| 155 | { |
| 156 | EMPTY_HOWTO (0), |
| 157 | EMPTY_HOWTO (1), |
| 158 | EMPTY_HOWTO (2), |
| 159 | EMPTY_HOWTO (3), |
| 160 | EMPTY_HOWTO (4), |
| 161 | EMPTY_HOWTO (5), |
| 162 | HOWTO (R_DIR32, /* type */ |
| 163 | 0, /* rightshift */ |
| 164 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 165 | 32, /* bitsize */ |
| 166 | FALSE, /* pc_relative */ |
| 167 | 0, /* bitpos */ |
| 168 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 169 | coff_i860_reloc, /* special_function */ |
| 170 | "dir32", /* name */ |
| 171 | TRUE, /* partial_inplace */ |
| 172 | 0xffffffff, /* src_mask */ |
| 173 | 0xffffffff, /* dst_mask */ |
| 174 | TRUE), /* pcrel_offset */ |
| 175 | /* {7}, */ |
| 176 | HOWTO (R_IMAGEBASE, /* type */ |
| 177 | 0, /* rightshift */ |
| 178 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 179 | 32, /* bitsize */ |
| 180 | FALSE, /* pc_relative */ |
| 181 | 0, /* bitpos */ |
| 182 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 183 | coff_i860_reloc, /* special_function */ |
| 184 | "rva32", /* name */ |
| 185 | TRUE, /* partial_inplace */ |
| 186 | 0xffffffff, /* src_mask */ |
| 187 | 0xffffffff, /* dst_mask */ |
| 188 | FALSE), /* pcrel_offset */ |
| 189 | EMPTY_HOWTO (010), |
| 190 | EMPTY_HOWTO (011), |
| 191 | EMPTY_HOWTO (012), |
| 192 | EMPTY_HOWTO (013), |
| 193 | EMPTY_HOWTO (014), |
| 194 | EMPTY_HOWTO (015), |
| 195 | EMPTY_HOWTO (016), |
| 196 | HOWTO (R_RELBYTE, /* type */ |
| 197 | 0, /* rightshift */ |
| 198 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 199 | 8, /* bitsize */ |
| 200 | FALSE, /* pc_relative */ |
| 201 | 0, /* bitpos */ |
| 202 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 203 | coff_i860_reloc, /* special_function */ |
| 204 | "8", /* name */ |
| 205 | TRUE, /* partial_inplace */ |
| 206 | 0x000000ff, /* src_mask */ |
| 207 | 0x000000ff, /* dst_mask */ |
| 208 | PCRELOFFSET), /* pcrel_offset */ |
| 209 | HOWTO (R_RELWORD, /* type */ |
| 210 | 0, /* rightshift */ |
| 211 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 212 | 16, /* bitsize */ |
| 213 | FALSE, /* pc_relative */ |
| 214 | 0, /* bitpos */ |
| 215 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 216 | coff_i860_reloc, /* special_function */ |
| 217 | "16", /* name */ |
| 218 | TRUE, /* partial_inplace */ |
| 219 | 0x0000ffff, /* src_mask */ |
| 220 | 0x0000ffff, /* dst_mask */ |
| 221 | PCRELOFFSET), /* pcrel_offset */ |
| 222 | HOWTO (R_RELLONG, /* type */ |
| 223 | 0, /* rightshift */ |
| 224 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 225 | 32, /* bitsize */ |
| 226 | FALSE, /* pc_relative */ |
| 227 | 0, /* bitpos */ |
| 228 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 229 | coff_i860_reloc, /* special_function */ |
| 230 | "32", /* name */ |
| 231 | TRUE, /* partial_inplace */ |
| 232 | 0xffffffff, /* src_mask */ |
| 233 | 0xffffffff, /* dst_mask */ |
| 234 | PCRELOFFSET), /* pcrel_offset */ |
| 235 | HOWTO (R_PCRBYTE, /* type */ |
| 236 | 0, /* rightshift */ |
| 237 | 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 238 | 8, /* bitsize */ |
| 239 | TRUE, /* pc_relative */ |
| 240 | 0, /* bitpos */ |
| 241 | complain_overflow_signed, /* complain_on_overflow */ |
| 242 | coff_i860_reloc, /* special_function */ |
| 243 | "DISP8", /* name */ |
| 244 | TRUE, /* partial_inplace */ |
| 245 | 0x000000ff, /* src_mask */ |
| 246 | 0x000000ff, /* dst_mask */ |
| 247 | PCRELOFFSET), /* pcrel_offset */ |
| 248 | HOWTO (R_PCRWORD, /* type */ |
| 249 | 0, /* rightshift */ |
| 250 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 251 | 16, /* bitsize */ |
| 252 | TRUE, /* pc_relative */ |
| 253 | 0, /* bitpos */ |
| 254 | complain_overflow_signed, /* complain_on_overflow */ |
| 255 | coff_i860_reloc, /* special_function */ |
| 256 | "DISP16", /* name */ |
| 257 | TRUE, /* partial_inplace */ |
| 258 | 0x0000ffff, /* src_mask */ |
| 259 | 0x0000ffff, /* dst_mask */ |
| 260 | PCRELOFFSET), /* pcrel_offset */ |
| 261 | HOWTO (R_PCRLONG, /* type */ |
| 262 | 0, /* rightshift */ |
| 263 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 264 | 32, /* bitsize */ |
| 265 | TRUE, /* pc_relative */ |
| 266 | 0, /* bitpos */ |
| 267 | complain_overflow_signed, /* complain_on_overflow */ |
| 268 | coff_i860_reloc, /* special_function */ |
| 269 | "DISP32", /* name */ |
| 270 | TRUE, /* partial_inplace */ |
| 271 | 0xffffffff, /* src_mask */ |
| 272 | 0xffffffff, /* dst_mask */ |
| 273 | PCRELOFFSET), /* pcrel_offset */ |
| 274 | EMPTY_HOWTO (0x15), |
| 275 | EMPTY_HOWTO (0x16), |
| 276 | EMPTY_HOWTO (0x17), |
| 277 | EMPTY_HOWTO (0x18), |
| 278 | EMPTY_HOWTO (0x19), |
| 279 | EMPTY_HOWTO (0x1a), |
| 280 | EMPTY_HOWTO (0x1b), |
| 281 | HOWTO (COFF860_R_PAIR, /* type */ |
| 282 | 0, /* rightshift */ |
| 283 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 284 | 16, /* bitsize */ |
| 285 | FALSE, /* pc_relative */ |
| 286 | 0, /* bitpos */ |
| 287 | complain_overflow_dont, /* complain_on_overflow */ |
| 288 | coff_i860_reloc_nyi, /* special_function */ |
| 289 | "PAIR", /* name */ |
| 290 | FALSE, /* partial_inplace */ |
| 291 | 0xffff, /* src_mask */ |
| 292 | 0xffff, /* dst_mask */ |
| 293 | FALSE), /* pcrel_offset */ |
| 294 | EMPTY_HOWTO (0x1d), |
| 295 | HOWTO (COFF860_R_HIGH, /* type */ |
| 296 | 16, /* rightshift */ |
| 297 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 298 | 16, /* bitsize */ |
| 299 | FALSE, /* pc_relative */ |
| 300 | 0, /* bitpos */ |
| 301 | complain_overflow_dont, /* complain_on_overflow */ |
| 302 | coff_i860_reloc, /* special_function */ |
| 303 | "HIGH", /* name */ |
| 304 | FALSE, /* partial_inplace */ |
| 305 | 0xffff, /* src_mask */ |
| 306 | 0xffff, /* dst_mask */ |
| 307 | FALSE), /* pcrel_offset */ |
| 308 | HOWTO (COFF860_R_LOW0, /* type */ |
| 309 | 0, /* rightshift */ |
| 310 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 311 | 16, /* bitsize */ |
| 312 | FALSE, /* pc_relative */ |
| 313 | 0, /* bitpos */ |
| 314 | complain_overflow_dont, /* complain_on_overflow */ |
| 315 | coff_i860_reloc, /* special_function */ |
| 316 | "LOW0", /* name */ |
| 317 | FALSE, /* partial_inplace */ |
| 318 | 0xffff, /* src_mask */ |
| 319 | 0xffff, /* dst_mask */ |
| 320 | FALSE), /* pcrel_offset */ |
| 321 | HOWTO (COFF860_R_LOW1, /* type */ |
| 322 | 0, /* rightshift */ |
| 323 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 324 | 16, /* bitsize */ |
| 325 | FALSE, /* pc_relative */ |
| 326 | 0, /* bitpos */ |
| 327 | complain_overflow_dont, /* complain_on_overflow */ |
| 328 | coff_i860_reloc, /* special_function */ |
| 329 | "LOW1", /* name */ |
| 330 | FALSE, /* partial_inplace */ |
| 331 | 0xfffe, /* src_mask */ |
| 332 | 0xfffe, /* dst_mask */ |
| 333 | FALSE), /* pcrel_offset */ |
| 334 | HOWTO (COFF860_R_LOW2, /* type */ |
| 335 | 0, /* rightshift */ |
| 336 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 337 | 16, /* bitsize */ |
| 338 | FALSE, /* pc_relative */ |
| 339 | 0, /* bitpos */ |
| 340 | complain_overflow_dont, /* complain_on_overflow */ |
| 341 | coff_i860_reloc, /* special_function */ |
| 342 | "LOW2", /* name */ |
| 343 | FALSE, /* partial_inplace */ |
| 344 | 0xfffc, /* src_mask */ |
| 345 | 0xfffc, /* dst_mask */ |
| 346 | FALSE), /* pcrel_offset */ |
| 347 | HOWTO (COFF860_R_LOW3, /* type */ |
| 348 | 0, /* rightshift */ |
| 349 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 350 | 16, /* bitsize */ |
| 351 | FALSE, /* pc_relative */ |
| 352 | 0, /* bitpos */ |
| 353 | complain_overflow_dont, /* complain_on_overflow */ |
| 354 | coff_i860_reloc, /* special_function */ |
| 355 | "LOW3", /* name */ |
| 356 | FALSE, /* partial_inplace */ |
| 357 | 0xfff8, /* src_mask */ |
| 358 | 0xfff8, /* dst_mask */ |
| 359 | FALSE), /* pcrel_offset */ |
| 360 | HOWTO (COFF860_R_LOW4, /* type */ |
| 361 | 0, /* rightshift */ |
| 362 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 363 | 16, /* bitsize */ |
| 364 | FALSE, /* pc_relative */ |
| 365 | 0, /* bitpos */ |
| 366 | complain_overflow_dont, /* complain_on_overflow */ |
| 367 | coff_i860_reloc, /* special_function */ |
| 368 | "LOW4", /* name */ |
| 369 | FALSE, /* partial_inplace */ |
| 370 | 0xfff0, /* src_mask */ |
| 371 | 0xfff0, /* dst_mask */ |
| 372 | FALSE), /* pcrel_offset */ |
| 373 | HOWTO (COFF860_R_SPLIT0, /* type */ |
| 374 | 0, /* rightshift */ |
| 375 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 376 | 16, /* bitsize */ |
| 377 | FALSE, /* pc_relative */ |
| 378 | 0, /* bitpos */ |
| 379 | complain_overflow_dont, /* complain_on_overflow */ |
| 380 | coff_i860_reloc_nyi, /* special_function */ |
| 381 | "SPLIT0", /* name */ |
| 382 | FALSE, /* partial_inplace */ |
| 383 | 0x1f07ff, /* src_mask */ |
| 384 | 0x1f07ff, /* dst_mask */ |
| 385 | FALSE), /* pcrel_offset */ |
| 386 | HOWTO (COFF860_R_SPLIT1, /* type */ |
| 387 | 0, /* rightshift */ |
| 388 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 389 | 16, /* bitsize */ |
| 390 | FALSE, /* pc_relative */ |
| 391 | 0, /* bitpos */ |
| 392 | complain_overflow_dont, /* complain_on_overflow */ |
| 393 | coff_i860_reloc_nyi, /* special_function */ |
| 394 | "SPLIT1", /* name */ |
| 395 | FALSE, /* partial_inplace */ |
| 396 | 0x1f07fe, /* src_mask */ |
| 397 | 0x1f07fe, /* dst_mask */ |
| 398 | FALSE), /* pcrel_offset */ |
| 399 | HOWTO (COFF860_R_SPLIT2, /* type */ |
| 400 | 0, /* rightshift */ |
| 401 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 402 | 16, /* bitsize */ |
| 403 | FALSE, /* pc_relative */ |
| 404 | 0, /* bitpos */ |
| 405 | complain_overflow_dont, /* complain_on_overflow */ |
| 406 | coff_i860_reloc_nyi, /* special_function */ |
| 407 | "SPLIT2", /* name */ |
| 408 | FALSE, /* partial_inplace */ |
| 409 | 0x1f07fc, /* src_mask */ |
| 410 | 0x1f07fc, /* dst_mask */ |
| 411 | FALSE), /* pcrel_offset */ |
| 412 | HOWTO (COFF860_R_HIGHADJ, /* type */ |
| 413 | 0, /* rightshift */ |
| 414 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 415 | 16, /* bitsize */ |
| 416 | FALSE, /* pc_relative */ |
| 417 | 0, /* bitpos */ |
| 418 | complain_overflow_dont, /* complain_on_overflow */ |
| 419 | coff_i860_reloc_nyi, /* special_function */ |
| 420 | "HIGHADJ", /* name */ |
| 421 | FALSE, /* partial_inplace */ |
| 422 | 0xffff, /* src_mask */ |
| 423 | 0xffff, /* dst_mask */ |
| 424 | FALSE), /* pcrel_offset */ |
| 425 | HOWTO (COFF860_R_BRADDR, /* type */ |
| 426 | 2, /* rightshift */ |
| 427 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 428 | 26, /* bitsize */ |
| 429 | TRUE, /* pc_relative */ |
| 430 | 0, /* bitpos */ |
| 431 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 432 | coff_i860_reloc_nyi, /* special_function */ |
| 433 | "BRADDR", /* name */ |
| 434 | FALSE, /* partial_inplace */ |
| 435 | 0x3ffffff, /* src_mask */ |
| 436 | 0x3ffffff, /* dst_mask */ |
| 437 | TRUE) /* pcrel_offset */ |
| 438 | }; |
| 439 | |
| 440 | /* Turn a howto into a reloc number. */ |
| 441 | |
| 442 | #define SELECT_RELOC(x,howto) { x.r_type = howto->type; } |
| 443 | #define BADMAG(x) I860BADMAG(x) |
| 444 | #define I860 1 /* Customize coffcode.h */ |
| 445 | |
| 446 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
| 447 | ((cache_ptr)->howto = \ |
| 448 | ((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \ |
| 449 | ? howto_table + (dst)->r_type \ |
| 450 | : NULL)) |
| 451 | |
| 452 | /* For 860 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared |
| 453 | library. On some other COFF targets STYP_BSS is normally |
| 454 | STYP_NOLOAD. */ |
| 455 | #define BSS_NOLOAD_IS_SHARED_LIBRARY |
| 456 | |
| 457 | /* Compute the addend of a reloc. If the reloc is to a common symbol, |
| 458 | the object file contains the value of the common symbol. By the |
| 459 | time this is called, the linker may be using a different symbol |
| 460 | from a different object file with a different value. Therefore, we |
| 461 | hack wildly to locate the original symbol from this file so that we |
| 462 | can make the correct adjustment. This macro sets coffsym to the |
| 463 | symbol from the original file, and uses it to set the addend value |
| 464 | correctly. If this is not a common symbol, the usual addend |
| 465 | calculation is done, except that an additional tweak is needed for |
| 466 | PC relative relocs. |
| 467 | FIXME: This macro refers to symbols and asect; these are from the |
| 468 | calling function, not the macro arguments. */ |
| 469 | |
| 470 | /* PR 17512: file: 0a38fb7c |
| 471 | Set an addend value, even if it is not going to be used. A tool |
| 472 | like coffdump might be used to print out the contents of the reloc. */ |
| 473 | #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) (cache_ptr)->addend = 0 |
| 474 | |
| 475 | /* We use the special COFF backend linker. */ |
| 476 | #define coff_relocate_section _bfd_coff_generic_relocate_section |
| 477 | |
| 478 | static reloc_howto_type * |
| 479 | coff_i860_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, |
| 480 | asection *sec, |
| 481 | struct internal_reloc *rel, |
| 482 | struct coff_link_hash_entry *h, |
| 483 | struct internal_syment *sym, |
| 484 | bfd_vma *addendp) |
| 485 | { |
| 486 | |
| 487 | reloc_howto_type *howto; |
| 488 | |
| 489 | if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0])) |
| 490 | { |
| 491 | bfd_set_error (bfd_error_bad_value); |
| 492 | return NULL; |
| 493 | } |
| 494 | |
| 495 | howto = howto_table + rel->r_type; |
| 496 | |
| 497 | if (howto->pc_relative) |
| 498 | *addendp += sec->vma; |
| 499 | |
| 500 | if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0) |
| 501 | { |
| 502 | /* This is a common symbol. The section contents include the |
| 503 | size (sym->n_value) as an addend. The relocate_section |
| 504 | function will be adding in the final value of the symbol. We |
| 505 | need to subtract out the current size in order to get the |
| 506 | correct result. */ |
| 507 | |
| 508 | BFD_ASSERT (h != NULL); |
| 509 | |
| 510 | /* I think we *do* want to bypass this. If we don't, I have seen some data |
| 511 | parameters get the wrong relocation address. If I link two versions |
| 512 | with and without this section bypassed and then do a binary comparison, |
| 513 | the addresses which are different can be looked up in the map. The |
| 514 | case in which this section has been bypassed has addresses which correspond |
| 515 | to values I can find in the map. */ |
| 516 | *addendp -= sym->n_value; |
| 517 | } |
| 518 | |
| 519 | /* If the output symbol is common (in which case this must be a |
| 520 | relocatable link), we need to add in the final size of the |
| 521 | common symbol. */ |
| 522 | if (h != NULL && h->root.type == bfd_link_hash_common) |
| 523 | *addendp += h->root.u.c.size; |
| 524 | |
| 525 | return howto; |
| 526 | } |
| 527 | |
| 528 | static reloc_howto_type * |
| 529 | coff_i860_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 530 | bfd_reloc_code_real_type code) |
| 531 | { |
| 532 | switch (code) |
| 533 | { |
| 534 | case BFD_RELOC_32: |
| 535 | return howto_table + R_DIR32; |
| 536 | case BFD_RELOC_860_PC26: |
| 537 | return howto_table + COFF860_R_BRADDR; |
| 538 | case BFD_RELOC_860_PC16: |
| 539 | /* ??? How to handle PC16 for COFF? SPLIT0 is close for now. */ |
| 540 | return howto_table + COFF860_R_SPLIT0; |
| 541 | case BFD_RELOC_860_LOW0: |
| 542 | return howto_table + COFF860_R_LOW0; |
| 543 | case BFD_RELOC_860_SPLIT0: |
| 544 | return howto_table + COFF860_R_SPLIT0; |
| 545 | case BFD_RELOC_860_LOW1: |
| 546 | return howto_table + COFF860_R_LOW1; |
| 547 | case BFD_RELOC_860_SPLIT1: |
| 548 | return howto_table + COFF860_R_SPLIT1; |
| 549 | case BFD_RELOC_860_LOW2: |
| 550 | return howto_table + COFF860_R_LOW2; |
| 551 | case BFD_RELOC_860_SPLIT2: |
| 552 | return howto_table + COFF860_R_SPLIT2; |
| 553 | case BFD_RELOC_860_LOW3: |
| 554 | return howto_table + COFF860_R_LOW3; |
| 555 | case BFD_RELOC_860_HIGHADJ: |
| 556 | return howto_table + COFF860_R_HIGHADJ; |
| 557 | case BFD_RELOC_860_HIGH: |
| 558 | return howto_table + COFF860_R_HIGH; |
| 559 | default: |
| 560 | BFD_FAIL (); |
| 561 | return 0; |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | static reloc_howto_type * |
| 566 | coff_i860_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| 567 | const char *r_name) |
| 568 | { |
| 569 | unsigned int i; |
| 570 | |
| 571 | for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++) |
| 572 | if (howto_table[i].name != NULL |
| 573 | && strcasecmp (howto_table[i].name, r_name) == 0) |
| 574 | return &howto_table[i]; |
| 575 | |
| 576 | return NULL; |
| 577 | } |
| 578 | |
| 579 | /* This is called from coff_slurp_reloc_table for each relocation |
| 580 | entry. This special handling is due to the `PAIR' relocation |
| 581 | which has a different meaning for the `r_symndx' field. */ |
| 582 | |
| 583 | static void |
| 584 | i860_reloc_processing (arelent *cache_ptr, struct internal_reloc *dst, |
| 585 | asymbol **symbols, bfd *abfd, asection *asect) |
| 586 | { |
| 587 | if (dst->r_type == COFF860_R_PAIR) |
| 588 | { |
| 589 | /* Handle the PAIR relocation specially. */ |
| 590 | cache_ptr->howto = howto_table + dst->r_type; |
| 591 | cache_ptr->address = dst->r_vaddr; |
| 592 | cache_ptr->addend = dst->r_symndx; |
| 593 | cache_ptr->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr; |
| 594 | } |
| 595 | else |
| 596 | { |
| 597 | /* For every other relocation, do exactly what coff_slurp_reloc_table |
| 598 | would do (which this code is taken directly from). */ |
| 599 | asymbol *ptr = NULL; |
| 600 | cache_ptr->address = dst->r_vaddr; |
| 601 | |
| 602 | if (dst->r_symndx != -1) |
| 603 | { |
| 604 | if (dst->r_symndx < 0 || dst->r_symndx >= obj_conv_table_size (abfd)) |
| 605 | { |
| 606 | (*_bfd_error_handler) |
| 607 | (_("%B: warning: illegal symbol index %ld in relocs"), |
| 608 | abfd, dst->r_symndx); |
| 609 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 610 | ptr = NULL; |
| 611 | } |
| 612 | else |
| 613 | { |
| 614 | cache_ptr->sym_ptr_ptr = (symbols |
| 615 | + obj_convert (abfd)[dst->r_symndx]); |
| 616 | ptr = *(cache_ptr->sym_ptr_ptr); |
| 617 | } |
| 618 | } |
| 619 | else |
| 620 | { |
| 621 | cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 622 | ptr = NULL; |
| 623 | } |
| 624 | |
| 625 | /* The symbols definitions that we have read in have been |
| 626 | relocated as if their sections started at 0. But the offsets |
| 627 | refering to the symbols in the raw data have not been |
| 628 | modified, so we have to have a negative addend to compensate. |
| 629 | |
| 630 | Note that symbols which used to be common must be left alone. */ |
| 631 | |
| 632 | /* Calculate any reloc addend by looking at the symbol. */ |
| 633 | CALC_ADDEND (abfd, ptr, (*dst), cache_ptr); |
| 634 | (void) ptr; |
| 635 | |
| 636 | cache_ptr->address -= asect->vma; |
| 637 | |
| 638 | /* Fill in the cache_ptr->howto field from dst->r_type. */ |
| 639 | RTYPE2HOWTO (cache_ptr, dst); |
| 640 | } |
| 641 | } |
| 642 | \f |
| 643 | #define coff_rtype_to_howto coff_i860_rtype_to_howto |
| 644 | #define coff_bfd_reloc_type_lookup coff_i860_reloc_type_lookup |
| 645 | #define coff_bfd_reloc_name_lookup coff_i860_reloc_name_lookup |
| 646 | |
| 647 | #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \ |
| 648 | i860_reloc_processing (relent, reloc, symbols, abfd, section) |
| 649 | |
| 650 | #include "coffcode.h" |
| 651 | |
| 652 | static const bfd_target * |
| 653 | i3coff_object_p(bfd *a) |
| 654 | { |
| 655 | return coff_object_p (a); |
| 656 | } |
| 657 | |
| 658 | const bfd_target |
| 659 | #ifdef TARGET_SYM |
| 660 | TARGET_SYM = |
| 661 | #else |
| 662 | i860_coff_vec = |
| 663 | #endif |
| 664 | { |
| 665 | #ifdef TARGET_NAME |
| 666 | TARGET_NAME, |
| 667 | #else |
| 668 | "coff-i860", /* name */ |
| 669 | #endif |
| 670 | bfd_target_coff_flavour, |
| 671 | BFD_ENDIAN_LITTLE, /* data byte order is little */ |
| 672 | BFD_ENDIAN_LITTLE, /* header byte order is little */ |
| 673 | |
| 674 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 675 | HAS_LINENO | HAS_DEBUG | |
| 676 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 677 | |
| 678 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ |
| 679 | '_', /* leading underscore */ |
| 680 | '/', /* ar_pad_char */ |
| 681 | 15, /* ar_max_namelen */ |
| 682 | 0, /* match priority. */ |
| 683 | |
| 684 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 685 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 686 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 687 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 688 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 689 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| 690 | |
| 691 | /* Note that we allow an object file to be treated as a core file as well. */ |
| 692 | {_bfd_dummy_target, i3coff_object_p, /* bfd_check_format */ |
| 693 | bfd_generic_archive_p, i3coff_object_p}, |
| 694 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
| 695 | bfd_false}, |
| 696 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
| 697 | _bfd_write_archive_contents, bfd_false}, |
| 698 | |
| 699 | BFD_JUMP_TABLE_GENERIC (coff), |
| 700 | BFD_JUMP_TABLE_COPY (coff), |
| 701 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 702 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| 703 | BFD_JUMP_TABLE_SYMBOLS (coff), |
| 704 | BFD_JUMP_TABLE_RELOCS (coff), |
| 705 | BFD_JUMP_TABLE_WRITE (coff), |
| 706 | BFD_JUMP_TABLE_LINK (coff), |
| 707 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 708 | |
| 709 | NULL, |
| 710 | |
| 711 | COFF_SWAP_TABLE |
| 712 | }; |